To be explicit: these are not usually processed in any way and are never used for analytics or tracking. I’ll occasionally (but rarely) use standard local Unix commands (grep, awk, etc.) to examine them directly on the server for troubleshooting, but that is their sole use and the only time they’re ever accessed.

Mastodon itself records a timestamp of each user’s most recent activity and IP address. I never access this information except in the course of investigating reports.

I have not enabled logging in S3, so I have no specific record of what media assets a user might have accessed. Amazon provides some aggregate statistics (“this many objects were accessed”, “we’ve served this many gigabytes of images”, “you owe us six bucks”, and so on) but nothing more granular.